The 24-year-old posted a picture to Instagram of her and fellow tennis player Marta Domachowska in Istanbul, where she’s currently competing in the Istanbul Cup.

While the post may seem innocuous, Wozniacki’s decision to post a picture of herself wearing heels, and a caption highlighting the fact, were decidedly more pointed.

“Out and about in Istanbul. It’s been 3 years since I have worn heels on a normal day out. #feelsgood #looksgood #shopping #highheels #sun,” she wrote.

The caption is a clear dig at McIlroy, 25, whom the Danish tennis star dated for three years. The golfer, who’s currently competing in the British Open, is listed as an inch shorter than his ex, who’s listed at 5 feet 10.